Cloud-Init Installation FAQ¶

You are advised to install Cloud-Init on the ECS that will be used to create a private image so that new ECSs created from the private image support custom configurations (for example, changing the ECS login password).

For details about how to install Cloud-Init, see Installing Cloud-Init.

For details about how to configure Cloud-Init, see Configuring Cloud-Init.

The following describes common problems you may encounter when installing Cloud-Init and their solutions.

Ubuntu 16.04/CentOS 7: Failed to Set Cloud-Init Automatic Start¶

Symptom
After Cloud-Init is installed, you run the following command to configure Cloud-Init automatic start:
systemctl enable cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service
Information similar to the following is displayed:
Figure 1 Failed to enable Cloud-Init to start automatically¶
Solution
1. Run the following command to roll back the configuration:
  systemctl unmask cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service
2. Run the following command to configure automatic start again:
  systemctl enable cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service
3. Run the following command to check the Cloud-Init status:
  systemctl status cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service
  As shown in the following figures, failed is displayed and all services are in the inactive state.
  Figure 2 Checking Cloud-Init status (1)¶
  Figure 3 Checking Cloud-Init status (2)¶
  This is because the address that the system uses to access Cloud-Init is redirected to /usr/bin/, but the actual installation path is /usr/local/bin.
4. Run the following command to copy Cloud-Init to the usr/bin directory:
  cp /usr/local/cloud-init /usr/bin/
5. Run the following command to restart Cloud-Init:
  systemctl restart cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service
  Figure 4 Restarting Cloud-Init¶
6. Run the following command to check the Cloud-Init status:
  systemctl status cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service

Ubuntu 14.04: chkconfig and systemctl Not Installed¶

Symptom
chkconfig is not installed.
Solution
Run the following commands to install chkconfig:
apt-get update
apt-get install sysv-rc-conf
cp /usr/sbin/sysv-rc-conf /usr/sbin/chkconfig
Run the following command to query the Cloud-Init version:
cloud-init -v
Information similar to the following is displayed:
```
-bash:/usr/bin/cloud-init:not found this command
```
Run the following command to copy Cloud-Init to the usr/bin directory:
cp /usr/local/bin/cloud-init /usr/bin/

Debian 9.5: Failed to Query the Cloud-Init Version and Configure Automatic Start¶

Run the following command to query the Cloud-Init version:
cloud-init -v
Information similar to the following is displayed:
```
-bash:/usr/bin/cloud-init:not found this command
```
Run the cp /usr/local/bin/cloud-init /usr/bin/ command to copy Cloud-Init to the usr/bin directory.
Run the cloud-init init --local command.
Information similar to the following is displayed:
Figure 5 Information returned when Cloud-Init automatic start successfully set¶
The compilation fails because GCC is not installed.
To solve this issue:
Run the following command to install GCC. Then, install Cloud-Init again.
yum -y install gcc
After Cloud-Init is installed, run the following command to configure Cloud-Init automatic start:
systemctl enable cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service
Information similar to the following is displayed.
Figure 6 Prompt indicating the failure to configure Cloud-Init automatic start¶
To solve this issue:
1. Run the following command to roll back the configuration:
  systemctl unmask cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service
2. Run the following command to set automatic start again:
  systemctl enable cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service
3. Run the following command to restart Cloud-Init:
  systemctl restart cloud-init-local.service cloud-init.service cloud-config.service cloud-final.service
  Run the systemctl status command to check the Cloud-Init status. Information similar to the following is displayed:
  Figure 7 Verifying the service status¶

CentOS 7/Fedora 28: Required C Compiler Not Installed¶

Symptom

After Cloud-Init is successfully installed, you run the following command:

cloud-init init --local

The following information is displayed:

/usr/lib/python2.5/site-packages/Cheetah/Compiler.py:1532: UserWarning:
You don't have the C version of NameMapper installed! I'm disabling Cheetah's useStackFrames option as it is painfully slow with the Python version of NameMapper. You should get a copy of Cheetah with the compiled C version of NameMapper.
  "\nYou don't have the C version of NameMapper installed!

Cause analysis
This alarm is generated because C version of NameMapper needs to be compiled when Cloud-Init is installed. However, GCC is not installed in the system, and the compilation cannot be performed. As a result, NameMapper is missing.
Solution
Run the following command to install GCC:
yum -y install gcc
Reinstall Cloud-Init.

CentOS 7/Fedora: Failed to Use the New Password to Log In to an ECS Created from an Image¶

Symptom
You cannot use a new password to log in to an ECS created from an image with Cloud-Init installed. After logging in to the ECS using the old password, you find that NICs of the ECS are not started.
Figure 8 NIC not started¶
Solution
Log in to the ECS used to create that image, open the DHCP configuration file /etc/sysconfig/network-scripts/ifcfg-ethX, and comment out HWADDR.

last updated: 2024-11-13 15:15 UTC - commit: b636e55e81d9b75131fd075994c6c3e2fb2c5042